Aeroplane



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C. D. McNAMARA.

AEROPLANE.

APPLICATION FILED MAY 4, 1921.

- Patented July 18 1922.

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C. D. McNAlVIARA.

AEROPLANE.

APPLICATION FILED MAY 4, 1921.

1 AEQS, 1 3 1 o Patented July 18, 1922.

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CHARLES DQ MCNAMARA, OF FAIR PLAY, COLORADO.

AEROPLANE.

Specification of Letters Patent. Patented J ly 18 1922 Application and May cater Serial No. 466,833..

'To all whom i t may concern:

Be it known that I, CHARLES D. Mo-

' NAMARA, a citizen of the United States, re-

sidin at Fair Play, in the county of Park and tate of Colorado, have invented cer-' tain new and useful Improvements in Aeroplanes, of which the following is a specification, reference being had to the accompanyin drawings.

his invention relates to improvements in aeroplanes and has foran important objectthereof the provision of auxiliary pivoted planes which maybe shifted to check the motion of the aeroplane to enable landing upon a restricted surface.-

A further object of the invention is to providean auxiliary plane ofthis character, the construction and arrangement of which is such that during the ordinary flying conditions it in nomanner interferes withv the normal operation of the aeroplane.

A further object of the invention is .to provide a device of this character in which the auxiliary plane is so balanced and arranged as to permit ready shifting thereof.

Other objects and advantages of the invention will become apparent throughout the course of the following description.

In the accompanying drawings, wherein for the purpose of illustration are shown preferred embodiments of my invention and wherein like reference characters designate like parts throughout:'

Figure 1 is a side elevation showing an auxiliary plane constructed in accordance with my invention applied to the wings of a biplane;

Figure 2 is a plan view thereof;

Figure 3 is a longitudinal sectional view therethrough; and

Figure 4 is a fragmentary plan View showing a slightly modified auxiliary plane arrangement.

Referring now more particularly to the drawings, the numeral 10 indicates the fuse- .lage of the aeroplane, the numeral 11, the

planes thereof- While in all instances the aeroplane has been illustrated-as being of the biplane type, it will hereinafter become tiple plane types with the same results.

oscillation inbearings 13. This shaft 12 has secured thereto at each side of the body of the fuselage, auxiliary planes 14, the planes 14 being secured to the shaft approximately centrally thereof and being so constructed that when in the position shown in Figure 1, the auxiliary plane forms substantially a continuation of the main plane, in fact if so desired, the, main plane may be materially shortened transversely and the rear section of the auxiliary plane 14 employed in lieu thereof. In order to prevent the wind or air pressure from entering beneath the forward edge of the auxiliary plane 14 when the same is in the position shown in Figure 1, I secure to the main plane in advance of the forward edge the auxiliary plane 14 extends entirely across the main plane, it .will of course be necessary to position the ailerons 16 in ad- Vance thereof. The construction shown in Figure 4 permits employment of the aux- In accordance with my invention, the

main plane 11 is provided upon its rear or trailing edge with a shaft 12 mounted for iliary plane 14 in conjunction with the usual wing construction but will not afford as great a resistive surface as the construction shown in Figure 2. The wings 14 being centrally pivoted upon the trailing edge, it will be obvious that upon shifting of the shaft about its pivot the pressure brought to bear upon the portions of the auxiliary plane lying upon the opposite sides of the pivot will be substantially equal, and accordingly no excessive strain need be placed upon the Shifting gear.

In Figure 3 I have illustrated a shift gear suitable for use in conjunction with my auxiliary planes which consists in a pivoted lever 17 coacting with a notched segment 18. A bell crank 19 embodies a power arm 20 and a pair of oppositely directed work arms 21 is pivotally mounted in the fuselage, and has the power arm 22 thereof connected with the lever 17. The ends of the work arms 21 are connected by links 23 with the the spirit of my invention, and I accord-' ingly do not limit myself to the specific structure hereinbefore set forth except as hereinafter claimed.

What I claim is:

1. In an aeroplane, the combination with a main plane thereof, of an auxiliary plane pivoted at its transverse center to said main plane and shiftable about its pivot to en-- gage and disengage the main plane, means to prevent air passing from what is the meeting edge of the auxiliary plane below said auxiliary .plane and means for shifting said auxiliary plane.

2. In an aeroplane, the combination with a main plane thereof, of an auxiliary plane pivoted at its transverse center to said main plane and shiftable about its pivot to engage and disengage the main plane, a baffle secured to said main plane and coacting with what is the leading edge of the auxiliary plane to prevent the passage of air currents therebeneath, and means for shifting said auxiliary plane.

In testimony whereof I hereunto aflix my signature.

.- CHARLES D. MQNAMARA. 

